US3407489A - Method for obtaining desired positions of electrical coils relative to magnetic cores - Google Patents

Method for obtaining desired positions of electrical coils relative to magnetic cores Download PDF

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Publication number
US3407489A
US3407489A US674805A US67480567A US3407489A US 3407489 A US3407489 A US 3407489A US 674805 A US674805 A US 674805A US 67480567 A US67480567 A US 67480567A US 3407489 A US3407489 A US 3407489A
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United States
Prior art keywords
core
winding
coil
turns
electrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US674805A
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English (en)
Inventor
Richard D Gibbs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US568593A external-priority patent/US3407472A/en
Priority claimed from US568605A external-priority patent/US3407474A/en
Priority to GB23630/67A priority Critical patent/GB1141136A/en
Priority to DE1613109A priority patent/DE1613109C3/de
Priority to NL6708398A priority patent/NL6708398A/xx
Priority to FR112090A priority patent/FR1539729A/fr
Priority to JP4877567A priority patent/JPS5330882B1/ja
Priority to US674805A priority patent/US3407489A/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to US680774A priority patent/US3407490A/en
Publication of US3407489A publication Critical patent/US3407489A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/0025—Shaping or compacting conductors or winding heads after the installation of the winding in the core or machine ; Applying fastening means on winding heads
    • H02K15/005—Shaping or compacting conductors or winding heads after the installation of the winding in the core or machine ; Applying fastening means on winding heads by means of electrodynamic forces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/53143—Motor or generator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/53196—Means to apply magnetic force directly to position or hold work part

Definitions

  • This invention relates to a method for obtaining a desired position of at least one electrical coil relative to a magnetic core required in the manufacture of inductive devices and the apparatus for practicing the method. More particularly, the present invention relates to such method and apparatus as are especially suitable for effecting changes in relative positions of coils with respectto cores in the manufacture of dynamoelectric machine members incorporated in small and fractional horsepower electric motors.
  • a method for obtaining a desired position of at least an electrical coil relative to a magnetic core having side turn portions received in the slots of the core and end turn portions extending beyond the end faces of the core.
  • a closed electrical path is provided through the coil for induced current flow through the plurality of coil turns.
  • An inductive coupled relationship of the coils is established with an electrical winding of an electrical inductive apparatus and at least one electrical energy surge, supplied from a suitable pulsing circuit or energy surge source, is injected into the winding of sufficient magnitude for effecting a transfer of the electrical coils to another position relative to the core.
  • This efficient yet economical procedure is quite versatile in nature and may be utilized to produce either symmetrical or assymmetrical end turns relative to the core.
  • the radial center of the electrical winding should be aligned in an axial direction with reference to the radial center of the core.
  • the end turns on either side of the core will assume different positions relative to the associated core end face and runs.
  • FIGURE 3 is a sectional view in schematic form showing one form of the present invention being practiced on a coil group of the stator revealed in FIGURE 1 to show the force back of the side portions and end turn portions and transfer of the end turn portions to the final desired position relative to the core;
  • FIGURE 4 is a schematic sectional view similar to FIGURE 3 showing a modification of thepresentinvention and the first step in obtaining asymmetrical coil end turn portions, with the portions on the respective sides of the core being disposed at dilferent locations and having different degrees of compaction; and
  • FIGURE 5 is a view similar to FIGURE 4 showing in schematic form the obtainment of the desired asymmetrical positions of the end turn portions on either side of the core.
  • the stator core includes the cus tomary thirty-six slots 14 formed between adjacent teeth sections 16 integrally joined together by yoke section 17.
  • the teeth sections terminate in enlarged lip portions 18 which together define a cylindrical rotor receiving bore 19 and thirty-six equally spaced apart slot entrances 21.
  • Each of the slots has a standard generally U-shaped slot liner 22 formed of suitable material, such as the well known polyethylene terephthalate sheet material, to provide electrical ground insulation next to the slot wall for the coil turns.
  • core groups 23 through 26 inclusive are connected such that they provide a closed electrical path, and at least one surge of electrical energy of a preselected magnitude is injected from a suitable energy surge source 31 into a primary winding 32 maintained in a fixed and inductive relation with the individual coil groups of the excitation windings.
  • a current surge is generated through the winding and an induced current surge through the coils. Electromagnetic forces resulting from the interaction of the currents, and a transient magnetic field produced by the energy surge effectively act on the turns to effect transfer of them from position A to position B shown in FIGURE 3.
  • the end turns become partially compacted, yet flared (slightly exaggerated) during the transfer, with the outer turns preferably being located near the associated core end face and the inner turns located at an angle from the axis of the core. This angle is generally determined by the magnitude of the surge, the type, size, and configuration of the coils and core, among the more important factors.
  • each magnetic pole for winding 20 is maintained in alignment with the equivalent center 32a of the adjacent magnetic pole of winding 32.
  • the fixture-33 and core 11 are maintained in the desired nonmovable relation during the practice of the method by any suitable means, as by a stationary supporting platform 47 formed of non-magnetic insulating material which engages the periphery of the core and stationary studs 48 or the like which enter a number of holes 49 extending axially into a rigid body from one end of fixture 33.
  • the arrangement includes a double-pole, double-throw switch 51 formed with an outer cylindrical housing 52 fabricated from non-magnetic insulating material. Electrically conductive contact elements 53, 54, and 55 are mounted within housing 52 in axially spaced apart relation and have electrical terminal posts 57, 58, 59 projecting out wardly through the housing walls.
  • the central element has opposed contact surfaces facing the single contact surfaces of elements 53, 55, with all surfaces being frustoconical in configuration and preferably being coated with silver or the like to provide a good electrical contact selectively with a pair of unusually shaped movable contact elements secured to a central actuator rod formed of non-magnetic material which form the movable blade 63 of the switch.
  • the mass of these elements must be sufficiently great to carry the magnitude of the energy surge, and the contact surfaces adapted to engage one another are complementary in shape.
  • Elongated slots 72, 73 are formed in switch housing 52 to receive electrical terminal posts 68, 69 of blade 63 and to permit the necessary movement of these posts as the movable elements are transferred between the associated stationary elements.
  • the actuator rod is in turn biased to the extended position in which blade 63 engages elements 54, 55 by a suitable spring 74 held under compression between the outer wall of the housing and a nut 76.
  • Switch 51 simultaneously places primary winding 32 in closed circuit across the terminals of the energy surge source 31, on the one side through winding lead 89, post 59, through jumper 91 to post 57, then to post 69 and line 93 by way of closed contact element 53 with one of the movable blade elements.
  • the other side 88 of the winding 32 is attached to line 94 through movable common'post
  • the energy surge source may be suitably actuated as by closing switch 92 of the source.
  • This energy surge source circuit may be of any type capable of supplying the desired energy surge, such as that more fully described and disclosed in the aforementioned US. patent application S.N. 414,826, now Patent No. 3,333,328.
  • closing of switch 92 actuates a circuit for charging a capacitor bank in the source 31 to a selected voltage level, which is regulated by a variable control transformer.
  • the capacitor bank discharges a surge of electrical energy, as controlled by the voltage level on the capacitor bank, through switch 51 to primary winding 32. This in turn produces the induced current flow through winding and the interacting faces and coil transfer to position B already outlined.
  • the selective connection of the excitation winding 20 to the surge source and short-circuit of primary winding 32 for transferring coils to position C are effected by moving the actuator rod of the movable blade assembly to the left to secure the movable elements in engagement with contact elements 54, 55.
  • primary winding 32 is in a closed path between leads 89 through the closed switch elements of post 59, 68.
  • the circuit between the excitation winding 20 and the energy surge source 31 is established from line 93 to closed contact elements of post 69, 58 and then through conductor 86 to connector 84.
  • connector 83 is in circuit with line 94 through conductor 85 and common post 68.
  • Surge source 31 may be again activated by actuating switch 92 and the surge of preselected magnitude injected into winding 20 through switch 51 as the primary winding 32 is short-circuited.
  • FIGURE 1 For the purpose of more clearly illustrating how the method embodying one form of my invention as described above has been satisfactorily carried out in actual practice, I will now set forth a specific example without intending to limit the present invention to that example.
  • the cores had the following nominal dimensions: bore diameter of 3.48 inches; corner-to-corner dimension of 6.29 inches; stack height of 0.9 inch; and slots carrying main windings varied in depth from 0.54 to 0.78 inch.
  • the coils were formed of enameled aluminum coated with polyvinyl formal type resin, having a nominal bare wire diameter of 0.038 inch and a total weight of 0.436 pound.
  • Each pole had 109.55 effective turns, with the turns per coil (innermost/outermost) being thirty-three, forty-four, and fifty-one.
  • the stator was of the type normally used in a one-sixth horsepower, single phase electric motor rated at 115 volts, 4.5 amps, 60 cycles per second.
  • the pulsing circuit or energy surge source incorporates a capacitor bank of 610 microfarads having a nominal rating of 630 microfarads.
  • the capacitor bank was charged to a voltage level of 1,800 volts and a surge discharged into the primary winding 32 as the excitation winding was short-circuited.
  • the surge had a peak of approximately 8,000 amperes at 3 /2 microseconds, with the surge lasting for about six microseconds. This moves back the coil side turns away from the bore approximately to inch. Anglewas between with the end turns having a contour somewhat similar to that shown in phantom at B in FIGURE 3.
  • FIGURES 4 and 5 The unusual versatility and accurate control afforded the end turn compaction and placement by the present invention is further revealed in FIGURES 4 and 5.
  • the end turn portions on either side of the core are being positioned asymmetrically, especially significant for those situations having different space requirements for each side of the core.
  • primary winding 32 is mounted such that its radial center 32b is offset from center 11b of the core in a direction toward the left by a preselected distance D.
  • the end of winding 32 will terminate axially short of the axial extent for the right end turn portions.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
US674805A 1966-07-28 1967-10-12 Method for obtaining desired positions of electrical coils relative to magnetic cores Expired - Lifetime US3407489A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB23630/67A GB1141136A (en) 1966-07-28 1967-05-22 Method and apparatus for developing coils in inductive devices
DE1613109A DE1613109C3 (de) 1966-07-28 1967-06-14 Vorrichtung zum Einbringen und Verformen der Wicklung eines Magnetkerns einer elektrischen Maschine
NL6708398A NL6708398A (de) 1966-07-28 1967-06-16
FR112090A FR1539729A (fr) 1966-07-28 1967-06-27 Procédé et appareillage de réalisation des bobinages de dispositifs inducteurs
JP4877567A JPS5330882B1 (de) 1966-07-28 1967-07-28
US674805A US3407489A (en) 1966-07-28 1967-10-12 Method for obtaining desired positions of electrical coils relative to magnetic cores
US680774A US3407490A (en) 1966-07-28 1967-11-06 Process for developing electrical coils in inductive devices

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US568593A US3407472A (en) 1966-07-28 1966-07-28 Apparatus for developing electrical coils in inductive devices
US568605A US3407474A (en) 1966-07-28 1966-07-28 Apparatus for obtaining desired positions of electrical coils relative to magnetic cores
US674805A US3407489A (en) 1966-07-28 1967-10-12 Method for obtaining desired positions of electrical coils relative to magnetic cores
US680774A US3407490A (en) 1966-07-28 1967-11-06 Process for developing electrical coils in inductive devices

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US3407489A true US3407489A (en) 1968-10-29

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US674805A Expired - Lifetime US3407489A (en) 1966-07-28 1967-10-12 Method for obtaining desired positions of electrical coils relative to magnetic cores
US680774A Expired - Lifetime US3407490A (en) 1966-07-28 1967-11-06 Process for developing electrical coils in inductive devices

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US680774A Expired - Lifetime US3407490A (en) 1966-07-28 1967-11-06 Process for developing electrical coils in inductive devices

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US (2) US3407489A (de)
JP (1) JPS5330882B1 (de)
DE (1) DE1613109C3 (de)
GB (1) GB1141136A (de)
NL (1) NL6708398A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634932A (en) * 1967-07-17 1972-01-18 Gen Electric Method for producing insulation in the slots of magnetic cores
US5463806A (en) * 1991-10-16 1995-11-07 France Transfo Method for compacting electrical windings equipping transformers

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5542456A (en) * 1994-07-26 1996-08-06 Odawara Engineering Co., Ltd. Coil wire handling apparatus
DE102018100016A1 (de) * 2018-01-02 2019-07-04 Elmotec Statomat Holding GmbH Verfahren und Vorrichtung zur Herstellung von Rotoren und Statoren einschließlich der Konfektionierung von Anschlussdrähten
CN111064329A (zh) * 2018-10-17 2020-04-24 株洲中车机电科技有限公司 一种嵌线定子翻转装置及其翻转方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333329A (en) * 1964-11-30 1967-08-01 Gen Electric Method for placing one or more electrical coils in desired spacial relationship with respect to a coil-accommodating member
US3333327A (en) * 1964-11-30 1967-08-01 Gen Electric Method of introducing electrical conductors into conductor accommodating structure
US3333328A (en) * 1964-11-30 1967-08-01 Gen Electric Methods for changing relative positions of movable conductors for use in electrical inductive devices
US3333335A (en) * 1964-11-30 1967-08-01 Gen Electric Method for altering the overall configuration of electrical coils wound from a number of conductor turns
US3333330A (en) * 1964-11-30 1967-08-01 Gen Electric Methods for effecting coil-pacing operations on electrical coils in coil-accommodating members
US3348183A (en) * 1966-05-02 1967-10-17 Gen Electric Electrical coils and methods for producing same
US3353251A (en) * 1964-11-30 1967-11-21 Gen Electric Apparatus for effecting conductorplacing operations on electrical coils in inductivedevices

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333329A (en) * 1964-11-30 1967-08-01 Gen Electric Method for placing one or more electrical coils in desired spacial relationship with respect to a coil-accommodating member
US3333327A (en) * 1964-11-30 1967-08-01 Gen Electric Method of introducing electrical conductors into conductor accommodating structure
US3333328A (en) * 1964-11-30 1967-08-01 Gen Electric Methods for changing relative positions of movable conductors for use in electrical inductive devices
US3333335A (en) * 1964-11-30 1967-08-01 Gen Electric Method for altering the overall configuration of electrical coils wound from a number of conductor turns
US3333330A (en) * 1964-11-30 1967-08-01 Gen Electric Methods for effecting coil-pacing operations on electrical coils in coil-accommodating members
US3353251A (en) * 1964-11-30 1967-11-21 Gen Electric Apparatus for effecting conductorplacing operations on electrical coils in inductivedevices
US3348183A (en) * 1966-05-02 1967-10-17 Gen Electric Electrical coils and methods for producing same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634932A (en) * 1967-07-17 1972-01-18 Gen Electric Method for producing insulation in the slots of magnetic cores
US5463806A (en) * 1991-10-16 1995-11-07 France Transfo Method for compacting electrical windings equipping transformers

Also Published As

Publication number Publication date
DE1613109C3 (de) 1974-10-10
NL6708398A (de) 1968-01-29
US3407490A (en) 1968-10-29
DE1613109B2 (de) 1972-12-21
DE1613109A1 (de) 1971-01-07
JPS5330882B1 (de) 1978-08-30
GB1141136A (en) 1969-01-29

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